// static void ApplyAddresses()
// {
// GDT.KernelSetup(GetAddrOfMapType(BootInfoMemoryType.GDT));
// PageTable.KernelSetup(
// GetAddrOfMapType(BootInfoMemoryType.PageDirectory),
// GetAddrOfMapType(BootInfoMemoryType.PageTable));
// }
// static Addr GetAddrOfMapType(BootInfoMemoryType type)
// {
// var mapLen = Header->MemoryMapLength;
// //KernelMessage.WriteLine("Maps: {0}", mapLen);
// for (uint i = 0; i < mapLen; i++)
// {
// if (Header->MemoryMapArray[i].Type == type)
// return Header->MemoryMapArray[i].Start;
// }
// return Addr.Zero;
// }
static void ApplyAddresses()
{
GDT.KernelSetup(GetMap(BootInfoMemoryType.GDT)->Start);
PageTable.KernelSetup(
GetMap(BootInfoMemoryType.PageDirectory)->Start,
GetMap(BootInfoMemoryType.PageTable)->Start);
}
public static void Main()
{
//Screen.BackgroundColor = ScreenColor.Green;
//Screen.Color = ScreenColor.Red;
//Screen.Clear();
//Screen.Goto(0, 0);
//Screen.Write('A');
//Serial.SetupPort(Serial.COM1);
//Serial.Write(Serial.COM1, "Hello");
BootMemory.Setup();
// Setup Kernel Log
var kmsgHandler = new KernelMessageWriter();
KernelMessage.SetHandler(kmsgHandler);
KernelMessage.WriteLine("<LOADER:CONSOLE:BEGIN>");
// Parse Boot Informations
Multiboot.Setup();
// Parse Kernel ELF section
SetupOriginalKernelElf();
// Print all section of Kernel ELF (for information only)
DumpElfInfo();
// Copy Section to a final destination
SetupKernelSection();
// Collection informations we need to pass to the kernel
BootInfo_.Setup();
// Setup Global Descriptor Table
var map = BootMemory.AllocateMemoryMap(0x1000, BootInfoMemoryType.GDT);
BootInfo_.AddMap(map);
GDT.Setup(map.Start);
// Now we enable Paging. It's important that we do not cause a Page Fault Exception,
// Because IDT is not setup yet, that could handle this kind of exception.
map = BootMemory.AllocateMemoryMap(PageTable.InitalPageDirectorySize, BootInfoMemoryType.PageDirectory);
BootInfo_.AddMap(map);
var map2 = BootMemory.AllocateMemoryMap(PageTable.InitalPageTableSize, BootInfoMemoryType.PageTable);
BootInfo_.AddMap(map2);
PageTable.Setup(map.Start, map2.Start);
// Because Kernel is compiled in virtual address space, we need to remap the pages
MapKernelImage();
// Get Entry Point of Kernel
uint kernelEntry = GetKernelStartAddr();
if (kernelEntry == 0)
{
KernelMessage.WriteLine("No kernel entry point found {0:X8}");
KernelMessage.WriteLine("Is the name of entry point correct?");
KernelMessage.WriteLine("Are symbols emitted?");
KernelMessage.WriteLine("System halt!");
while (true)
{
Native.Nop();
}
}
KernelMessage.WriteLine("Call Kernel Start at {0:X8}", kernelEntry);
// Start Kernel.
CallAddress(kernelEntry);
// If we hit this code location, the Kernel Main method returned.
// This would be a general fault. Normally, this code section will overwritten
// by the kernel, so normally, it can never reach this code position.
KernelMessage.WriteLine("Unexpected return from Kernel Start");
Debug.Break();
}
